Airport Greenhouse Gas Emissions Management - Zurich Airport

8.3.4 The ACA provides four levels of certification, whose requirements are briefly described as
follows:
• Level 1 – Mapping – An inventory of sources and annual quantities of CO 2 emissions
under an airport operator’s direct control (Scope 1 and 2 sources) with options to include
some Scope 3 sources and non-CO 2 GHGs. A list of other emissions sources (Scope 3) is
also required.
• Level 2 – Reduction – As well as the Level 1 inventory, a Carbon Management Plan
for Scope 1 and 2 sources should be developed and implemented, and evidence of
measurement, reporting and on-going emissions reductions must be provided.
• Level 3 – Optimization – The inventory must be extended to include some Scope 3
sources including (at least) aircraft LTO, APU, surface access and corporate travel. The
Carbon Management Plan must be extended to include further stakeholder engagement
and on-going emissions reductions must be demonstrated.
• Level 3+ - Neutrality – As well as the Level 3 requirements, the airport operator must
demonstrate that it has offset its residual Scope 1 and 2 emissions and has thus achieved
“Carbon Neutrality.”
review
8.3.5 Only CO 2 management is mandatory for the ACA scheme. Airport operators can include emissions
of other GHG on a voluntary basis.
8.3.6 The ACI Europe ACA scheme is available to any airport in the world and ACI World is currently
investigating options for a formal global adoption.
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